COBALT SULFAMATE PLATING

Can you give some information about a cobalt sulfamate plating bath?


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Q. Can you give some information about a cobalt sulfamate plating bath? M.F.

 

A. Cobalt and nickel are quite similar in many of their properties so you would expect the plating baths to be similar.
There is one difference cobalt dissolves with 100% efficiency without the use of chloride or bromides whereas nickel usually requires the presence of the anions to obtain efficient dissolution.
Following is a typical formulation for the bath. ? 

 

ComponentConcentration
Cobalt sulfamate450 g/L
Formamide30 g/L
Total cobalt metal105 g/L
 
ParameterControl Range
pH3–5
Temperature20–50oC
Current density10–50 ASF

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